Hydraulic impactor methods and apparatus
阅读：913发布：2023-12-25
专利汇可以提供Hydraulic impactor methods and apparatus专利检索，专利查询，专利分析的服务。并且Methods and apparatus for generating two separated fluid flows that each include direct flow components as well as alternating, out-of-phase flow components, such separated flows being transmitted into two separate cavities that have interposed between them a mass capable of periodic movement responsive to the out-of-phase alternating flows. The direct flow component is discharged from each cavity through a passageway having entrances adjacent the ends of an enlarged central portion of the mass to center the mass. In addition, a flow restriction means in a discharge port connected with the passageway maintains a selected pressure level in the system. The sizes of the cavities, the size of the mass and the differential areas of the mass produce a selected ratio of the operating frequency to the natural frequency of the system.，下面是Hydraulic impactor methods and apparatus专利的具体信息内容。
1. Hydraulic impactor apparatus comprising: a hydraulic pump having at least two out-of-phase, alternating flow fluid outputs, each output having a direct fluid flow component in addition to an alternating flow component; power means connected with and motivating said hydraulic pump; a housing having two cavities, each in communication with a respective fluid output, thus effecting out-of-phase alternating flow into said cavities; a piston mounted in said housing between and communicating with said cavities, and having an enlarged mid-region that substantially separates the cavities; bearing means between the piston and the housing; a passageway formed through said housing and having its ends terminating at the inner surface of the housing approximately at the extremities of the enlarged end region of the piston; a discharge port extending through the housing between said passageway and the exterior of the housing; a moil supported by the housing in proximity with one end of the piston for periodic impacting thereby.
2. Hydraulic impactor apparatus comprising: a hydraulic pump having a wobble plate and a plurality of pistons reciprocated by said wobble plate during rotation to provide alternating fluid flow, said pistons being grouped into two banks, each of which connects with a separate fluid output and in addition has at least one piston associated with inlet and outlet check valves to provide a direct fluid flow superimposed on said alternating fluid flow, the output fluid flow of each bank being out-of-phase relative to the output fluid flow of the other baNk; power means connected with and motivating said hydraulic pump; a housing having two cavities each in communication with a respective said fluid output, thus effecting out-of-phase alternating flow into said cavities; a piston mounted in said housing between and communicating with said cavities, and having an enlarged mid-region that substantially separates the cavities; bearing means between the piston and the housing; a passageway formed through said housing and having its ends terminating at the inner surface of the housing approximately at the extremities of the enlarged end region of the piston; a discharge port extending through the housing between said passageway and the exterior of the housing; and a moil supported by the housing in proximity with one end of the piston for periodic impacting thereby.
3. Hydraulic impactor apparatus comprising: a hydraulic pump having at least two out-of-phase, alternating flow fluid outputs, each output having a direct fluid flow component in addition to an alternating flow component; power means connected with and motivating said hydraulic pump; a housing having two cavities, each in communication with a respective fluid output, thus effecting out-of-phase alternating flow into said cavities; a piston mounted in said housing between and communicating with said cavities, and having an enlarged mid-region that substantially separates the cavities through engagement with a central portion of the housing; bearing means between the piston and the housing; a passageway formed through said housing and having its ends terminating at the inner surface of the housing approximately at the extremities of the enlarged end region of the piston; a discharge port extending through the housing between said passageway and the exterior of the housing; a flow restriction means mounted in said discharge port to provide a selected minimum fluid pressure to prevent cavitation; and a moil supported by the housing in proximity with one end of the piston for periodic impacting thereby.
4. The apparatus of claim 3 in which said flow restriction means comprises an orifice.
5. The apparatus of claim 3 in which said selected minimum fluid pressure is not less than 250 psia to prevent cavitation and to maintain essentially constant fluid acoustic properties.
6. Hydraulic impactor apparatus comprising: fluid flow generator means for producing a direct fluid flow component and an alternating fluid flow component in two outputs in which the alternating fluid flow components are out-of-phase; a housing connected with said fluid flow generator means; a piston with an enlarged portion and end portions defining differential areas communicating with separated fluid cavities in the housing, each such cavity being connected respectively with one of said out-of-phase outputs; piston centering means carried by the housing and including a passageway having the ends terminating at the inner surface of the housing approximately at the extremities of the enlarged portion of the piston, and a discharge port communicating with said passageway to effect a flow passage for the direct fluid flow component from each cavity past one edge region of one end extremity of said enlarged portion of the piston; and a moil carried by said housing in proximity with said piston for impacting thereby.
7. The apparatus of claim 6 which further comprises a flow restriction means in the discharge port to maintain a selected minimum fluid pressure to prevent cavitation.
8. The apparatus of claim 7 in which the flow restriction means comprises an orifice.
9. The apparatus of claim 7 in which said flow restriction means is sized to maintain a pressure of at least 250 psia.
10. Hydraulic impactor apparatus comprising: a hydraulic pump means having at least two out-of-phase, piston generated alternating flow fluid outputs, each output having a piston generatEd direct fluid flow component in addition to an alternating flow component; power means connected with and motivating said hydraulic pump; a housing having two cavities, each of which being in communication with a respective said fluid output, thus effecting out-of-phase alternating flow into said cavities; a piston mounted in said housing between said cavities, and with respective end portions communicating therewith to reciprocate the piston responsive to the out-of-phase alternating flow into the cavities; a discharge port in the housing to discharge the direct fluid flow from the housing; a moil supported by the housing in proximity with one end of the piston for periodic impacting thereby.
11. The apparatus of claim 10 which further comprises a flow restriction means in said discharge port to provide a selected minimum fluid pressure.
12. The apparatus of claim 11 in which said flow restriction means comprises an orifice.
13. The apparatus of claim 11 in which said selected minimum fluid pressure is not less than 250 psia.
14. Hydraulic impactor apparatus comprising: fluid flow generator means for producing a direct flow component and an alternating flow component in two outputs in which the alternating fluid flow components are out-of-phase; a housing connected with said fluid flow generator means; a piston carried by the housing with an enlarged portion and end portions defining differential areas communicating with separated cavities in the housing, said cavities being connected respectively with said out-of-phase outputs, the ratio of the operating frequency of the alternating fluid generator to the natural frequency of the piston cavity system being in a range between 0.55 and 0.95; a discharge port connected with each said cavity to provide for the discharge of said direct flow components; and a moil supported by the housing in proximity with one end of the piston for periodic impacting thereby.
15. The apparatus of claim 14 which further comprises a flow restriction means in the discharge port to maintain a selected minimum fluid pressure.
16. The apparatus of claim 15 in which the flow restriction means comprises an orifice.
17. The apparatus of claim 15 in which said flow restriction means is sized to maintain a pressure of at least 250 psia.
18. The apparatus of claim 14 in which said ratio is between 0.70 and 0.80.
19. The method of hydraulic impacting comprising the steps of: generating out-of-phase alternating fluid flows in two separated fluid regions; generating a selected quantity of direct fluid flow in each said region; transmitting the fluid flows in said regions to two separate cavities; interposing between said cavities a mass for periodic movements responsive to the out-of-phase fluid flows in said cavities; discharging from said cavities said selected quantity of fluid while maintaining a selected minimum fluid pressure to prevent cavitation; impacting a moil with the mass during its periodic movements; the ratio of the operating frequency to the natural frequency of the piston cavity system being in a range of 0.55 to 0.95 by sizing the system components in accordance with the expression: where W is the operating frequency of the alternating flow pump in radians per second, Wn is the natural frequency of the piston cavity system in radians per second, A is the differential area in square feet of the enlarged portion of the piston, c is the velocity of sound propagation in the hydraulic fluid in feet per second, M is the mass of the piston in slugs, V is the effective volume of one of the fluid cavities in cubic feet, and Rho o is the density of the hydraulic fluid in slugs per cubic feet.
20. The method of claim 19 in which the selected minimum fluid pressure in said cavities is not less than 250 psia.
21. The method of claim 19 which further comprises the step of centering mass reciprocation with respect to the housing by controlling the discharge of fluid from each of said cavities.
22. Hydraulic impactor apparatus comprising: fluid flow generator means for producing a direct flow component and an alternating flow component in two outputs in which the alternating fluid flow components are out-of-phase; a housing connected with said fluid flow generator means; a piston carried by the housing with an enlarged portion and end portions defining differential areas communicating with separated cavities in the housing, said cavities being connected respectively with said out-of-phase outputs; the ratio of the operating frequency to the natural frequency of the piston cavity system being in a range of 0.55 to 0.95 by sizing the system components in accordance with the expression: where W is the operating frequency of the alternating flow pump in radians per second, Wn is the natural frequency of the piston cavity system in radians per second, A is a differential area in square feet of the enlarged portion of the piston, c is the velocity of sound propagation in the hydraulic fluid in feet per second, M is the mass of the piston in slugs, V is the effective volume of one of the fluid cavities in cubic feet, and Rho o is the density of the hydraulic fluid in slugs per cubic foot; and a moil supported by the housing in proximity with one end of the piston for periodic impacting thereby.
23. The apparatus of claim 22 which further comprises means maintaining the pressure in said cavities at not less than 250 psia.
24. The apparatus of claim 22 which further comprises piston centering means carried by the housing and in communication with said piston.
25. The apparatus of claim 22 in which the ratio of W/Wn is between 0.70 and 0.80.
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